(setq PRG3 '
	(
		(int a b)
		(main
			(
			(a = (1 + 2 * 3))
			(printf a) ;7
			
			(a = (1 + 2 * 3 + 1))
			(printf a) ; 8
			
			(a = (1 + 2 * (3 + 1)))
			(printf a) ; 9
			
			)
		)
	)
)
